An anomaly determination apparatus determines an anomaly of a current control apparatus which supplies a control current to a control target and includes a current anomaly determination section. The current anomaly determination section is configured to compare a normal numerical range within which a state quantity changing with the control current falls in a particular state with a particular state quantity which is the state quantity corresponding to the control current generated by the control current generation section in the particular state, and determine that at least one of the reference resistor, the reference current generation section, and the control current generation section is in an anomalous state in the case where the particular state quantity has deviated from the normal numerical range. By using the current anomaly determination section, the anomaly determination apparatus can determine an anomaly of the current control apparatus.

Techniques are disclosed herein that provide for controlling torque in a vehicle. In some embodiments, desired torque values are generated and are compared to an amount of torque currently being generated by an engine. If a different amount of torque is desired, an engine speed target is altered in a linear fashion, and then converted back to a torque request to be provided to an engine ECU for implementation. Techniques disclosed herein may cause changes in torque demand to be limited in such a way to cause predictable and smooth changes in engine speed, even when engine speed and torque do not have a linear relationship to each other.

A controller for an internal combustion engine includes processing circuitry. The processing circuitry is configured to execute an inflow process when an oxygen storage amount of the catalyst is greater than or equal to a predetermined amount. The inflow process includes operating the fuel injection valve to cause a fluid containing oxygen and unburned fuel to flow into the catalyst. An amount of the unburned fuel is greater than or equal to an ideal amount of unburned fuel that reacts with all of the oxygen. The processing circuitry is configured to execute, based on a detection value of the air-fuel ratio sensor obtained during an execution of the inflow process, a deviation amount calculation process that calculates a deviation amount indication value that indicates a deviation amount of a detection value of the air-fuel ratio sensor.

A method is presented for regulating a filling of an exhaust gas component reservoir of a catalytic converter in the exhaust of an internal combustion engine. Using a first catalytic converter model, an actual fill level of the exhaust gas component reservoir is ascertained. An aging state of the catalytic converter is determined; and a set of model parameters of the first catalytic converter model is allocated to the aging state; the individual model parameters being ascertained by interpolation from basic values of model parameters, the basic values having been determined for at least two different aging states of a catalytic converter of identical design.

Techniques are disclosed herein that provide for controlling torque in a vehicle. In some embodiments, desired torque values are generated and are compared to an amount of torque currently being generated by an engine. If a different amount of torque is desired, an engine speed target is altered in a linear fashion, and then converted back to a torque request to be provided to an engine ECU for implementation. Techniques disclosed herein may cause changes in torque demand to be limited in such a way to cause predictable and smooth changes in engine speed, even when engine speed and torque do not have a linear relationship to each other.

The purpose of the present invention is to detect deterioration of dead time characteristics of an air-fuel ratio sensor with high accuracy without causing running performance and exhaust performance to worsen. The present invention provides a control device for an engine, characterized by being equipped with: a means for detecting an air-fuel ratio; a means for changing the air-fuel ratio in a predetermined cycle; and a means for sending a notification of an abnormality in the air-fuel ratio detection means or causing at least a portion of the engine control to run in a fail-safe mode when the amplitude of an output signal of the air-fuel ratio detection means at a predetermined frequency is within a predetermined range and the required time or required angle to arrive at a predetermined value of the output signal of the air-fuel ratio detection means from a reference position or reference time point of an engine-related parameter is equal to a predetermined value or higher.

The invention relates to a method for exhaust gas aftertreatment in an internal combustion engine. For purposes of the exhaust gas aftertreatment in the internal combustion engine, an exhaust gas system is provided in which a first three-way catalytic converter is arranged, as seen in the direction in which the exhaust gas of the internal combustion engine flows through the exhaust gas system, while at least another three-way catalytic converter is arranged downstream from the first three-way catalytic converter. Here, at least one lambda probe is arranged in an exhaust gas channel of the exhaust gas system upstream from the appertaining three-way catalytic converters. In the proposed method, a component temperature of the three-way catalytic converters is determined and compared to a light-OFF temperature. In this process, the lambda control of the internal combustion engine is carried out by means of the lambda probe upstream from the last three-way catalytic converter that has reached its light-OFF temperature.

Moreover, according to the invention, an exhaust gas aftertreatment system for carrying out such a method is being proposed.

A feed pump supplies fuel to a port injection valve of an engine through low pressure fuel piping by applying a pressure to fuel. An engine ECU controls a fuel pressure which is a pressure applied to fuel by driving the feed pump. When the feed pump is driven to lower the fuel pressure, and it is determined that vapor is generated in the fuel piping, the engine ECU executes a fuel pressure control that increases the fuel pressure provided at the time of determination.

Techniques are disclosed herein that provide for controlling torque in a vehicle. In some embodiments, desired torque values are generated and are compared to an amount of torque currently being generated by an engine. If a different amount of torque is desired, an engine speed target is altered in a linear fashion, and then converted back to a torque request to be provided to an engine ECU for implementation. Techniques disclosed herein may cause changes in torque demand to be limited in such a way to cause predictable and smooth changes in engine speed, even when engine speed and torque do not have a linear relationship to each other.

A fuel delivery system for a machine powered by Liquified Natural Gas (LNG) fuel is provided. The fuel delivery system includes a pressure sensor provided in fluid communication with a fuel supply line, a first valve provided in in association with a high-pressure fuel rail circuit, a second valve provided in association with a low-pressure circuit, and a controller. The controller is configured to receive a signal indicative of a pressure of the LNG fuel present in the fuel supply line. The controller is also configured to compare the pressure of the LNG fuel with a predetermined pressure threshold. The controller is further configured to control at least one of the first valve and the second valve to selectively supply the LNG fuel to the high-pressure fuel rail circuit and the low-pressure circuit based, at least in part, on the comparison.